Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 721 · 40 questions

The fast method (One-step multiplier): Increase by p%: multiply by (100 + p)% — up 20% is × 1.2. Decrease by p%: multiply by (100 − p)% — down 25% is × 0.75. Easy way to multiply: × the whole number (115 or 75), then ÷ 100.

1. 1.640 increased by 5% =
2. 2.748 decreased by 75% =
3. 3.260 decreased by 5% =
4. 4.500 increased by 15% =
5. 5.200 decreased by 15% =
6. 6.760 increased by 35% =
7. 7.640 decreased by 5% =
8. 8.725 increased by 60% =
9. 9.730 increased by 10% =
10. 10.682 increased by 50% =
11. 11.760 increased by 15% =
12. 12.730 increased by 30% =
13. 13.540 increased by 15% =
14. 14.600 increased by 8% =
15. 15.705 increased by 20% =
16. 16.155 decreased by 20% =
17. 17.750 increased by 30% =
18. 18.732 decreased by 25% =
19. 19.420 increased by 5% =
20. 20.550 decreased by 12% =
21. 21.795 increased by 60% =
22. 22.700 increased by 20% =
23. 23.255 decreased by 40% =
24. 24.760 increased by 5% =
25. 25.80 increased by 10% =
26. 26.360 decreased by 60% =
27. 27.365 decreased by 40% =
28. 28.45 decreased by 20% =
29. 29.620 increased by 15% =
30. 30.710 increased by 20% =
31. 31.140 decreased by 40% =
32. 32.234 increased by 50% =
33. 33.50 increased by 10% =
34. 34.160 increased by 35% =
35. 35.125 increased by 12% =
36. 36.610 increased by 50% =
37. 37.676 decreased by 25% =
38. 38.700 increased by 60% =
39. 39.300 increased by 35% =
40. 40.120 increased by 5% =

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